chrisw
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Posts posted by chrisw
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Agreed. Several months ago this was a great site for me to learn the basics about my UM2 and about 3DP in general. When I had an issue, the answer would be easy to find in past posts, or I'd ask in a new post, and somebody else would be quick to solve my dilemma.
Now it's difficult to do much of anything in here, which leads me to look for other 3DP info sources online.
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gadgetfreak - That's an informative PPT. Thanks! I'm downloading meshmixer now. Also I like your idea of applying a coating to prevent filament from sticking. I'll work with that idea when I get home in another week or two.
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I'd like to design my own support structures into some models. Cura's automated supports work well usually, but I figure it'll save time & material if I draw supports into the part.
I have some ideas of how to proceed, but I figured ask around here first:
1) How to make a support wall be very easy to remove, leaving few artifacts?
2) How best to support a flat horizontal surface, yet the support removes cleanly?
3) If I'm printing the same part 50 times, is it feasible to print supports separately and reuse them repeatedly (dropping these supports in place after pausing at Z)? What material to use for such supports, so that maybe the item's material won't bond with it?
TIA,
Chris
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Didier: I was reading that thread when it first started. I din't realize it expanded so much. I'll go through it tonight
GR5: Thanks for those links. More reading for tonight!
Chris
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In my dream world, this would be an option available after the Pause command. Suppose you come home and notice the printer had some issue half way through a print. The printer's still going through the motions, however no extrusion has been happening for the last 100 layers.
No worries... just hit Pause, get the issue sorted out, then choose the Continue from layer # _ _ _ option, and rotate the UM2 wheel to choose the appropriate layer. the Z-axis would respond as the wheel is rotated, so you can figure out how far back you need to go.
This literally was a dream option because I was recently overseas, using a more portable printer during my travels, and dealing with underextrusion issues. I would wake up, jump to hit Pause as soon as the clicking of a filament slippage occurred, fix the issue, then resume and get back to sleep. If I slept through that noise, then the whole print would need a restart.
Chris
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Availability is a big issue. Last time I checked:
UMO+ = 2 months
UM2 = 2 weeks
I've been happy with my UM2. Recently I realized just how easy things have been with my UM2, because I purchased a travel-friendly 3D printer kit from another company. The build part was easy, but with this new small printer I lack the ease of use that I came to expect from Ultimaker. For example, the software apps for my new kit hasn't been tailored to suit that printer. There are many settings that I need to experiment with, need look up the correct values for, etc. It requires a lot of fiddling to make it work well.
Back to the actual subject though.. UMO vs UM2... unless the delivery times are now near equal, I'd go with a UM2 just because you'll be able to use it this quarter.
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I'm only 2 months into 3D printing, so I'm still learning lots per day. One thing that seems confusing to me in Cura is print speed.
It's measured in mm of travel of the nozzle per second, if i understand that part correctly. However, the amount of filament getting pushed through the .4 mm nozzle seems like it would be better represented by a volume measurement. If I can print at 50 mm/s at .06 layer height, that doesn't mean I'll be able to do the same at .1 layer height.
I didn't realize that point when I first opened the UM2, read the manual, and started printing. In the Cura manual there's a statement explaining print speed, however I think it's leaving out some important data about the association of layer height to nozzle travel speed. The manual states:
"Basic Settings: Print Speed
Print speed sets the speed at which the print is put down. The default of 50mm per second is a bit low for an Ultimaker. But this is a safe starting point. People have printed up to speeds of 120mm per second. But this requires a well calibrated and tuned machine."
What was the layer height and the material used for the 120mm/s speed?
Maybe a useful feature in Cura could be to choose between using either a Print Speed setting, or a Material Volume per second speed. If I were to set the ideal flow rate for a particular material, and I kept using that material, then it seems I could adjust the layer height, and it would print just as well at all layer heights. The nozzle travel speed would be automatically adjusted inside Cura.
Or was that idea visited and tossed out long ago in the world of 3DP? Or am I completely off track and missing something about the speed calculations?
Chris
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paul had me introduced to alibre, but the engine is so so terrible that making something complex is borderline crashing it... all those engine parts they show in the demos? pure miracle that they got them working.
now that 3dsystems bought them and rebranded them to geomagic, I don't see how alibre will ever be improved.
Agreed. I bought Geomagic Design (Alibre) a couple months ago because it was affordable compared to many other options, and it appeared to be robust. Going through their tutorials instilled confidence in me... it appeared Geomagic would let me create whatever I'd need. Then I started getting a little more competent at 3D design, so my drawings started getting more complex. That's when the frequent crashes began. Oh well, now I save often.
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If you haven't already, I'd suggest trying a different SD card. My UM2 had an issue one day where it was printing about 1 cm worth of layers, then it would bring the bed back up to layer 1 level, and continue printing. so the print would be in 1cm slices, with earlier slices knocked onto the floor. A new card solved that... maybe the original one got corrupted when I pulled it out of the computer without ejecting it in Cura first.
In any case, good luck... I hope you get your UM2 working well. I've been very happy with mine so far. The prints I've been making at home are better than those I was paying $$$ for remotely.
Chris
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Best idea is to call your CC company and let them know what's happening. Probably they blocked the purchase because of the red flags that were raised by an overseas purchase.
If you let them know it's a legitimate purchase, they'll probably ok it, so the third time will probably work.
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Woo Hoo... according to UPS tracking, mine should delivered here in CA on Monday! Thanks Illuminarti!
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Disclaimer: I'm new to Cura and 3DP in general, just playing with Cura while I'm waiting for my UM2 to arrive.
I'm using Cura 14.09 and it seems like I'm having a similar experience. I have a few overhangs on my item, and supports are being built beneath the overhangs, but they appear to stop about 1 CM below the overhangs. I've changed various settings in the Expert Config, but none of the changes seem to make the supports go where I want them to go.
Any suggestions on a change I should make that I've been overlooking?
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I'm in the same boat, but I paid in full on the 24th. It's now been 5 business days since payment was processed, and this quote is in the product description:
"Usually ships within 5 business days after receiving full payment"
Hopefully that means I'll get a tracking # in the next day or so.
*fingers crossed*
Drastic Suggestion: please reply if you agree
in UltiMaker.com
Posted
Sander,
This is my third attempt to reply to you... not your fault, but something about the design of this page just tends to reject my attempts at navigating it.
For example, on my first attempt to describe some of my complaints with this page, I attempted to open a view of the Categories in a new window. At the top of this page I right-clicked "Forum", chose "Open in a new window". Sure enough a new window opened, however this one in which I'm writing also vanished and went to the main Forum page.
During my second attempt to write a reply here, I started telling you that first story. After I'd almost finished typing it, a big error message showed up on the screen about a timeout. So that text was wiped out... I navigate back here, and this time I'm "copying all" every few seconds just in case, so next time I won't need to retype.
These are the sorts of frustrating issues that I feel are wasting time during each visit here. Maybe it just requires learning the quirks of this system.
Also, over half the time that I'm browsing forums these days, it's on my Android. For some reason this page responds very slowly on my Android browser. So I watch a blank white screen while I'm waiting for it to load.